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United States Patent | 5,019,288 |
Garcia | May 28, 1991 |
An acidic solution for use as a cleaning composition for copper and copper alloys includes a solution of from about 1-20 weight percent hydrochloric acid and approximately 80-99 weight percent of an aqueous hydrochloric acid-based composition which has a pH of less than about 1.0 yet is substantially non-reactive with compounds having low oxidative states, including human skin tissue.
Inventors: | Garcia; Silverio M. (Louisville, CO) |
Assignee: | Chem-Shield, Inc. (Ogden, UT) |
Appl. No.: | 456987 |
Filed: | December 22, 1989 |
Current U.S. Class: | 510/254; 134/3; 216/106; 252/79.2; 252/79.4; 510/108; 510/255; 510/434; 510/499 |
Intern'l Class: | C09K 013/04; C23G 001/02; B44C 001/22; C23F 001/00 |
Field of Search: | 252/79.2,79.4,142,146 156/634,656,666 134/2,3,34,40,41 |
4181622 | Jan., 1980 | Gavin | 252/143. |
4199469 | Apr., 1980 | Walzer | 252/146. |
4250048 | Feb., 1981 | Levesks | 252/142. |
4477364 | Oct., 1984 | Garcia | 252/142. |
4581102 | Apr., 1986 | Brock | 156/645. |